A Key Account Manager Responsibilities, therefore would handle the most important client relationships in an organization to ensure satisfaction and growth. A KAM’s responsibilities include; client needs, tailored-made delivery, and new business opportunities. Consultative selling marks the center of these efforts focusing on listening to clients and providing solutions specially crafted to meet the clients’ unique goals. This helps build trust between the company and the client, thus strengthening relationships and fueling long-term success for both.